Triangle read by rows: T(n,k) is the number of free polyaboloes (or polytans) with n cells (counted as in A390996) of which k are square cells consisting of two triangles sharing a hypotenuse, 0 <= k <= n.
A391192
Triangle read by rows: T(n,k) is the number of free polyaboloes (or polytans) with n cells (counted as in A390996) of which k are square cells consisting of two triangles sharing a hypotenuse, 0 <= k <= n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =3a(7) =7a(8) =4a(9) =2a(10) =6a(11) =19a(12) =31a(13) =14a(14) =5a(15) =7a(16) =61a(17) =137a(18) =138a(19) =54a(20) =12a(21) =13a(22) =149a(23) =580a(24) =860a(25) =643a(26) =211a(27) =35a(28) =18a(29) =362
External references
- oeis: A391192